养猪、养鹅主要适合种哪几种牧草

1.籽粒苋:别名千穗谷、猪苋菜等,属一年生草本植物.它具有生长快、产量高、耐热、耐旱、耐湿、耐盐碱、抗病虫害、适应性强等特点.籽粒苋株高2～3米,直径可达3～5厘米,单株有效分枝30～50个,叶长15～30厘米,绿色或紫色.对土壤要求不严;生长适宜温度为24～26℃,低于10℃或高于38℃生长缓慢或停止.     

兔螨虫病虫株分类和防治技术研究

兔螨虫病是由疥螨、痒螨寄生在兔皮肤表层而引起的一种传染性很强的寄生虫病。近几年来,随国内消费市场的需求,农户养兔的越来越多,随之而来的兔病也增多,尤其是螨虫病在兔群中普遍发生和流行,严重影响兔的生长发育和繁殖。感染严重者死亡率较高,同时也影响毛皮和肉品的质量,给     

“雪狐”扁穗冰草（Snowfox Crested Wheatgrass）

“雪狐”扁穗冰草是禾本科冰草属长寿型多年生草本植物。须根十分发达，茎秆直立、丛生，株高50-70cm叶长5～10cm，宽0．2～0．5cm；穗状花序长5～7cm，小穗水平排列呈蓖齿状，种子黄褐色，千粒重约2．0g。     

Construction of Full-length cDNA of Recombinant Rabies Virus SRV9 Strain Expressing EgM123 Gene of Echinococcus granulosus

The aim of the experiment was to construct the recombinant rabies virus SRV₉ vaccine strain with EgM123 gene by reverse genetics technology and provide the technical means for effective prevention and control of rabies and hydatidosis in China's agricultural and pastoral areas.In this study,the structural protein N,P and L genes of rabies virus SRV₉ were synthesized using gene synthesis technology,which was based on the complete genome sequence of rabies virus SRV₉ and the fusion fragment of the N-P-M fusion fragment and the rabies G gene,through the carrier of enzyme insertion connection methods,the recombinant rabies virus L gene,N-P-M gene fusion fragment and G+EgM123+eGFP gene fusion fragment were successively recombined on the expression vector pcDNA3.1(-) to construct the full-length cDNA of recombinant rabies virus SRV₉ with EgM123 gene.The synthesized genes were constructed on pcDNA3.1(-) expression vector,and the results of transformation,plasmid digestion and gene sequencing showed that the length of N,P,L,N+P+M and G+EgM123+eGFP gene fragments were 1 365,1 107,6 471,3 160 and 3 256 bp,respectively.The full-length cDNA fragment of EgM123 gene recombinant rabies virus full-length cDNA was 12 465 bp,and the sequencing results of each gene fragment were 100%.In this experiment,the full-length cDNA fragment of recombinant EgM123 rabies and eukaryotic expression vectors of the N,P and L genes of rabies virus were successfully constructed,which could save EgM123 gene recombinant rabies by reverse genetics,it also provided the reference for the development of rabies and hydatid disease combined gene recombinant oral live vaccine.     

Study on Synergistic Effect of VA5 Immunopotentiator on Pigeon NDV Inactivated Vaccine

This study was designed to evaluate the synergistic effect of VA5 immunopotentiator on pigeon ND4416 inactivated vaccine.160 healthy pigeons were randomly divided into four groups,including ND4416 strain inactivated vaccine group (NDV group),ND4416 strain inactivated vaccine and immunopotentiator (VA5) mixed group (NDV+VA5 group),La Sota inactivated vaccine group (La Sota group) and normal saline as the control group (C group),to assess their vaccine efficacy against virulent pigeon NDV by serological analysis and animal testing.Pigeons sera were collected at different time points after immunization and measured the HI antibody titer of each group.The results showed that VA5 immunopotentiator significantly improved the serum antibody level of pigeons immunized with pigeon Newcastle disease inactivated vaccine (P<0.05).In addition,comparative test of spleen lymphocyte transformation was conducted at various time points after immunization.The results indicated that VA5 effectively stimulated the lymphocyte transformation of immune pigeon.Pigeons in each groups were challenged with ND4416 strain at the 30th,90th and 180th d after immunization.The results presented that the NDV+VA5 group had 100% protection rate and higher than La Sota group.The duration of immunization test showed that the antibody titer of NDV+VA5 group reached peak 11.20log₂ at the 21st d,remained 7.50log₂ at 180th d,and the protection rate remained 100% at 180th d.It indicated that VA5 immunopotentiator sustained the immune duration of pigeon NDV vaccine up to 180 d.Moreover,the in vitro detoxification test results suggested that VA5 immunopotentiator reduced the in vitro detoxification cycle of pigeons after challenge.Overall,this study suggested VA5 immunopotentiator could significantly improve the immune efficacy of pigeon Newcastle disease inactivated vaccine,which provided a basis for further enhancing the efficacy of Newcastle disease vaccine,as well increased experimental data for the application of immunopotentiators.     

全株水稻粉对生长猪生长性能和血清生化指标的影响

将36头台系杜洛克生长猪随机分为2个处理组,即对照组和10%稻粉组,研究添加10%稻粉对生长猪生长和血液指标的影响。结果表明:日粮中添加10%的全株粉时,生长肥育猪日增重比对照组低了2.94%,日采食量比对照组低了1.13%(P>0.05),饲料转化率比对照组低了1.57%(P>0.05)。因此,生长肥育猪的生长性能没有受到显著影响,试验组血液指标与对照组之间也没有显著差异。     

Ⅰ型鸭肝炎病毒变异株的鉴定

鸭病毒性肝炎是雏鸭的一种高度致死性传染病,其特点是发病急、病程短、传播快、死亡率高,死亡鸭多呈角弓反张,其肝脏常有特征性的出血性病变.鸭肝炎病毒（duck hepatitis virus, DHV）是本病病原,目前归属于小RNA病毒科的未确定种,DHV分为Ⅰ型、Ⅱ型和Ⅲ型,其中Ⅰ型呈世界范围分布,Ⅱ型仅限于英国,Ⅲ型则限于美国.DHV还存在一类毒株,与Ⅰ型仅有部分血清学相关性,Sandhu等（1992）称之为Ⅰ型的变异株,命名为Ⅰa型。     

大果牛心柿的栽培技术要点

我县于2000年引入大果牛心柿300株试栽．经4年观察，该品种表现适应性、早果性和丰产性强，定植后第2年结果，第3年株产7kg，第4年株产18kg。     

大樱桃砧木大青叶的快繁技术研究

大樱桃砧木大青叶是烟台市高新区大樱桃砧木科研所选育，叶片宽大浓绿．根系发达，抗寒性强．高抗根癌病，盛果期长，嫁接亲和力强．无小脚现象。但大青叶扦插不易生根，水平压条繁殖出苗率低，为加快大青叶苗的繁育，我们对其进行了组培快繁研究，旨在为工厂化生产做好准备。     

核桃自控电热温床嫁接育苗技术

2003年以来，我所借鉴陕西商洛的核桃嫁接育苗经验，采用自控电热温床嫁接育苗技术，繁育核桃苗木18万株，成活率达85％。现将该技术简介如下。